Schneider Electric ZB4BS944 Push-button Switch 22mm

Product Description

The SCHNEIDER ELECTRIC ZB4BS944 is a heavy-duty industrial push-button switch designed for control panel and machine operator interface applications. It features a 22 mm mounting hole diameter, a round red extended mushroom-head actuator, and supports both maintained and momentary operation modes in a single unit. The actuator body is constructed from metal, providing durability in demanding industrial environments. Rated for NEMA 4, 4X, 12, and 13 enclosures, this switch is built to resist dust, oil, and water ingress. It is installed by licensed electricians and industrial control technicians working on machine control circuits, operator stations, and safety-related switching systems.

This push-button switch is suited for use in industrial and commercial machine control applications where a 22 mm panel cutout is standard. The red mushroom-head profile makes it well-suited for emergency-stop or attention-critical operator functions. Its dual-mode operation — maintained and momentary — gives panel designers flexibility for a range of control logic requirements. The compact form factor and metal construction make it appropriate for both indoor and outdoor-rated enclosures where NEMA 4X corrosion resistance is required.

Key Features

• 22 mm mounting hole diameter fits standard industrial panel cutouts
• Round red extended mushroom-head actuator for high-visibility operator identification
• Supports both maintained and momentary operation modes
• Metal push-button construction for durability in industrial environments
• NEMA 4, 4X, 12, and 13 ratings for dust, oil, and water resistance
• Meets multiple international standards including UL 508, CSA C22.2 No. 14, EN/IEC 60947-5-1, and EN/ISO 13850

Compatibility

Designed as an OEM-style replacement or new-installation push-button switch for industrial control panels requiring a standard 22 mm mounting hole diameter.

Installation Notes

Installation should be performed by a qualified electrician in accordance with NEC requirements and applicable local codes. De-energize and lock out the control panel before mounting or wiring this switch. Verify enclosure NEMA rating compatibility before installation to maintain the ingress protection rating of the panel assembly. Do not exceed the contact ratings specified in the manufacturer technical datasheet.